Drop-hammer



J. F. COX.

DROP HAMMER.

APPLICATION FILED ,'AN.3,1919.

1,356,908, Patented Oct. 26, 1920.

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UNITED STATES JOSEPH F. COX, 0F SPRINGFIELD, MASSACHUSETTS.

DROP-HAMMER.

Specification of Letters Patent.

Patented Oct. 26, 1920.

Application filedJ'anuary 3, 1919. Serial No. 269,515.

To all whom it may concern:

Be it known that I, JOSEPH F. Cox, a citizen of the United States, residing at Springfield, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Drop-Hammers, of which the following is a specification.

This invention relates to that portion of a drop-hammer which includes a bottom die adapted to cooperate with a weighted top die which is alternately raised and released to drop upon work resting on the lower die, the top die being guided in a predetermined vertical path, and the bottom die being adjustable to enable it to accurately register with the top die.

The bottom die is supported by a fixed shoe forming a part of the hammer frame, and usually capable of being adjusted laterally with relation to the frame, or toward the right or left of an operator standing at the front of the hammer, suitable means, not relating to the present invention, being usually provided for effecting lateral adjustments of the shoe. It is essential that the bottom die be longitudinally adjustable on the shoe, toward and from the operators station.

The invention is embodied in improved means, as hereinafterdescribed and claimed, for longitudinally adjusting the bottom die and for positively securing the bottom die in any position to which it is longitudinally adjustable.

Of the accompaning drawings forming a part of this specification,

Figure 1 is a fragmentary front elevation showing a portion of a drop-hammer embodying the invention.

Fig. 2 is a section on line 2-2 of Fig. 1.

Fig. 3 is a bottom plan view of the bottom die. Fig. 4: is a top plan view of the shoe and the die-adjusting means shown by Figs. 1 and 2, the bottom die being removed.

Fig. 5 is a section on line 55 of Fig. 2.

Fig. 6 is a View similar to a portion of Fig. 2, showingan alternative construction.

Fig. 7 is a side view of the head shown by Fig.6.

Fig. 8 is a perspective view of the head and connecting rod shown by Figs. 1, 2, a and 5.

The same reference characters indicate the same parts in all of the figures.

Fig. l of the drawings represents somewhat conventionally portions of the frame of a drop-hammer, said portions including a base 12 and uprights 13 between which the weighted-gravitating upper die, not shown, is guided in a predetermined path.

14 represents the shoe which is fixedly mounted on the base 12 and may be, in accordance with the usual practice, adjustable laterally or toward the right or left of the machine as viewed in Fig. 1, which shows the side of the machine toward which the operator faces. Any suitable and well known means may be provided for laterally ad usting and securing the shoe.

16 represents the bottom die which is engaged with the shoe in such manner that the die is adjustable longitudinally, or toward and from the operators station, the shoe and die being provided with means for permitting a longitudinal adjustment of the die and preventing a lateral adjustment independently of the shoe. As here shown, the shoe is provided with dove-tailed gibs 17 and 18, fitting the dovetailed lower portion of the die, the gib 18 being supplemented by a removable gib or key 18*.

The construction thus far described i is common and well known. v

In carrying out my invention, I provide a rod movable with the bottom die 16, and means for imparting longitudinal movement through said rod to longitudinally adjust the die.

In the preferred embodiment of the invention, shown by Figs. 1 to 5, inclusive, and by Fig. 8, the die 16 is provided in its lower side with a recess 19, which is preferably a slot extending across the dove-tailed portion of the die as shown by Fig. 3, said recess receiving an upstanding tenon 20 formed on the inner end of the rod 21, said rod being elongated to extend from the recess 19 which is preferably formed at the longitudinal center of the die 16 to a point at the outer end of the shoe -14.

The preferred form of rod-adjusting means includes a head 22 afiixed to or formed on the outer end of the rod 21 and provided with a slot 28, and an adjusting screw 24 having a threaded portion engaged with a tapped socket 25 in the shoe 14, said screw being movable endwise when rotated and provided with spaced apart collars 26 and 27 bearing on opposite sides of the head 22. Said collars impart endwise movement from the screw to the rod 21 and the die 16,

the movement being such as to adjust the die longitudinally.

To positively secure the die 16 at anylongitudinal adjustment I provide locking means preferably embodied in grooves 28 formed in the periphery of the collar 27, sockets 29 formed in the outer face of the head 22, and locking pins 30 insertible in the sockets 29and in two of the grooves 28. Although I have shown two sockets 29 and two locking pins 80, it is obvious that a single locking pin will accomplish-the desired result.

It will now be seen thatthe'rod 21 constitutes a connecting rod adapted to impart motion in either direction from the head 22 to the die 16. Said rod is preferably inter posed between the die and the shoe, as shown by Fig. 2, the shoe being provided with a longitudinal channel 30 which receives and guides the shoe. The'rod thus arranged is not liable to be affected by expansion or contraction of the parts subjected to heat, and the construction is of a simple, relatively inexpensive and durable character.

Figs. 6 and 7 show an alternative construction, adapted for use when the thickness of the shoe H is insutlicient to permit the formation of the tapped socket 25 therein. socket 25 in the rod 21 and engage the threaded portion of the screw 24 therewith. Instead of connecting the screw through its collars 26 and 27 with ahead formed on the rod 21, I provide a fixed head-22 bolted to the frame portion 12. It will be seen, therefore, that the adjustingscrew is not moved endwise when rotated, but is held froin moving endwise by the head 22 and the collars 26-and 27, the engagement of the screw with the tapped socket 25 causing the rod 21 to move when the screw is rotated. Thescrew may be locked against rotationby pins 30 engaging grooves in the collar 27 and th'e sockets 29engaging the head 22.

Each of the illustrated embodiments of the invention includes a supporting frame having a horizontal shoe-supporting base 12, on which the shoe 14 is longitudinally adjustable, a bottom die 15, longitudinally adjustable on the shoe, an adjustingrod 21, longitudinally adjustable on the shoe and engaged with the bottom die to impart longitudinal movements thereto in either direction, and rod-adjusting mechanism operable entirely from the front side ofthe frame and comprising an adjusting-screw 2a, oppositely acting pressure-imparting collars or members 26 and 27, fixed to the screw, and means cooperating with said screw and pressure-imparting members to cause an inward longitudinal movement of the rod by the rotation of the screw in one direction, and an outward longitudinal movement of the rod by a rotation of thescrew in the op- In this modification I form a tapped posite direction. In Figs. 1 and 4, I show said cooperating means embodied in the tapped socket 25, and the movable slotted rod head 22. In Figs. 6 and 7, I show the cooperating means embodied in the tapped socket 25 and the fixed slotted head 22*.

In the preferred embodiment shown by Figs. 1 and 2, theshoe 14 is adjustable laterally on the base 12, and the bottom die, the rod 20, and the rod-adjusting mechanism are all carried by, and adjustable laterally with the shoe. In the embodiment shown by Figs. 6 and 7, the shoe 14-. is not adjustable laterally, owing to the fact that the head 22 is rigidly attached to the base portion of the frame, and prevents lateral movements of the adjusting-screw 2 1, the rod 21, and the shoe.

Each of the described embodiments of the invention provides means for accurately adj usting the bottom die and for maintaining it at the desired adjustment, so that the bottom die may be accurately confined in the desired relation to the path ofthe gravitating top die.

It will be seen that the adjusting-screw is operable by an operator standing at one side of the hammer, and that the operator is not required'to move from his usual position to adjust the bottom die and to lock and release the adjusting screw.

I claim:

1. Ina drop-hammer in combination, a supporting frame having a horizontal shoesupporting base, a shoe longitudinally adjustable on said base, a bottom die longitudinally adjustable on the shoe, an adjusting-rod longitudinally adjustable on the shoe, and engaged with the bottom die to impart longitudinal movements to the latter in either direction, and rod adjusting mechanism operable entirely from the front side of the frame and comprising an adjustingscrew, oppositely acting pressure-imparting members fixed to the screw, andmeans cooperating'with said screw and pressure-imparting members to cause an inward longitudinal movement of the rod by a rotation of the screw in one direction, and an outward longitudinal movement of the rod by a rotation of the screw in the opposite d1- rection. w

2111 a drop-hammer in combination, a supporting frame having a horizontal shoesupporting base, a'shoe longitudinally adjustable on said base, a bottom die longitudinally adjustable on the shoe, an adjusting-rod longitudinally adjustable on the shoe, and engaged with the bottom die to impart longitudinal movements to the latter 1 in either direction, and rod-adjusting mechanism operable entirely from the front side of the frame and comprising an adjustingscrew, oppositely-acting pressure-imparting members fixed'to the screw, and means cooperating with'said screw and pressure-imparting members to cause an inward longi tudinal movement of the rod by the rotation of the screw in one direction, and an outward longitudinal movement of the rod by a rotation of the screw in the opposite direction, means being provided for locking said screw against rotation in either direction.

3. In a drop-hammer in combination, a supporting frame having a horizontal shoesupporting base, a shoe longitudinally adjustable on the base, a bottom die longitudinally adjustable on the shoe, an adjusting-rod longitudinally adjustable on the shoe, and engaged with the bottom die to impart longitudinal movements thereto in either direction, said rod being provided at its outer end with a slotted head, and rodadjusting mechanism carried by the shoe, and operable entirely from the front side of the frame, said mechanism comprising a tapped socket in the shoe, extending par-- allel with the rod, an adjusting-screw en.- gaged with said socket, and having a smooth portion in the slot of said head, and oppositely acting pressure imparting members fixed to the screw, and bearing on opposite sides of the rod head, to cause an inward longitudinal movement of the rod by a rotation of the screw in one direction, and an outward longitudinal movement of the rod by a rotation of the screw in the opposite direction.

4. In a drop-hammer-in combination, a supporting frame having a horizontal shoesupporting base, a shoe longitudinally adjustable on the base, a bottom die longitudinally-adjustable on the shoe, an adjusting-rod longitudinally adjustable on the shoe, and engaged with the bottom die to impart longitudinal movements thereto in either direction, said rod being provided at its outer end with a slotted head, and rodadjusting mechanism carried by the shoe, and operable entirely from the front side of the frame, said mechanism comprising a tapped socket in the shoe, extending parallel with the rod, an adjusting-screw engaged with said socket, and having a smooth portion in the slot of said head, and oppositelyacting pressure-imparting members'fixed to the screw, and bearing on opposite sides of the rod head, to cause an inward longitudinal movement of the rod by the rotation of the screw in one direction, and an outward longitudinal movement of the rod by a rotation of the screw in the opposite direction, and means for locking one of said members to the rod head to prevent rotation of the screw in either direction.

In testimony whereof I have affixed my signature.

JOSEPH F. COX. 

